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   <div id="projectname">Reranker Framework (ReFr)
   
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   <div id="projectbrief">Reranking framework for structure prediction and discriminative language modeling</div>
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<a href="environment-impl_8_c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright 2012, Google Inc.</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">//</span>
<a name="l00004"></a>00004 <span class="comment">// Redistribution and use in source and binary forms, with or without</span>
<a name="l00005"></a>00005 <span class="comment">// modification, are permitted provided that the following conditions are</span>
<a name="l00006"></a>00006 <span class="comment">// met:</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">//   * Redistributions of source code must retain the above copyright</span>
<a name="l00009"></a>00009 <span class="comment">//     notice, this list of conditions and the following disclaimer.</span>
<a name="l00010"></a>00010 <span class="comment">//   * Redistributions in binary form must reproduce the above</span>
<a name="l00011"></a>00011 <span class="comment">//     copyright notice, this list of conditions and the following disclaimer</span>
<a name="l00012"></a>00012 <span class="comment">//     in the documentation and/or other materials provided with the</span>
<a name="l00013"></a>00013 <span class="comment">//     distribution.</span>
<a name="l00014"></a>00014 <span class="comment">//   * Neither the name of Google Inc. nor the names of its</span>
<a name="l00015"></a>00015 <span class="comment">//     contributors may be used to endorse or promote products derived from</span>
<a name="l00016"></a>00016 <span class="comment">//     this software without specific prior written permission.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00019"></a>00019 <span class="comment">// &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00020"></a>00020 <span class="comment">// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00021"></a>00021 <span class="comment">// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00022"></a>00022 <span class="comment">// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00023"></a>00023 <span class="comment">// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment">// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span>
<a name="l00025"></a>00025 <span class="comment">// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span>
<a name="l00026"></a>00026 <span class="comment">// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00027"></a>00027 <span class="comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00028"></a>00028 <span class="comment">// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00029"></a>00029 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00030"></a>00030 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00035"></a>00035 <span class="comment"></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &quot;<a class="code" href="environment-impl_8_h.html" title="Provides an environment for variables and their values, either primitive or Factory-constructible obj...">environment-impl.H</a>&quot;</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include &quot;<a class="code" href="factory_8_h.html" title="Provides a generic dynamic object factory.">factory.H</a>&quot;</span>
<a name="l00038"></a>00038 
<a name="l00039"></a>00039 <span class="keyword">namespace </span>reranker {
<a name="l00040"></a>00040 
<a name="l00041"></a><a class="code" href="classreranker_1_1_environment_impl.html#a950ed9620daeffdd2d3e26a9a58f5e0a">00041</a> <a class="code" href="classreranker_1_1_environment_impl.html#a950ed9620daeffdd2d3e26a9a58f5e0a" title="Constructs a new, empty environment.">EnvironmentImpl::EnvironmentImpl</a>(<span class="keywordtype">int</span> debug) {
<a name="l00042"></a>00042   debug_ = debug;
<a name="l00043"></a>00043 
<a name="l00044"></a>00044   <span class="comment">// Set up VarMap instances for each of the primitive types and their vectors.</span>
<a name="l00045"></a>00045   var_map_[<span class="stringliteral">&quot;bool&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;bool&gt;</a>(<span class="stringliteral">&quot;bool&quot;</span>, <span class="keyword">this</span>);
<a name="l00046"></a>00046   var_map_[<span class="stringliteral">&quot;int&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;int&gt;</a>(<span class="stringliteral">&quot;int&quot;</span>, <span class="keyword">this</span>);
<a name="l00047"></a>00047   var_map_[<span class="stringliteral">&quot;double&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;double&gt;</a>(<span class="stringliteral">&quot;double&quot;</span>, <span class="keyword">this</span>);
<a name="l00048"></a>00048   var_map_[<span class="stringliteral">&quot;string&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;string&gt;</a>(<span class="stringliteral">&quot;string&quot;</span>, <span class="keyword">this</span>);
<a name="l00049"></a>00049   var_map_[<span class="stringliteral">&quot;bool[]&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;vector&lt;bool&gt;</a> &gt;(<span class="stringliteral">&quot;bool[]&quot;</span>, <span class="keyword">this</span>);
<a name="l00050"></a>00050   var_map_[<span class="stringliteral">&quot;int[]&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;vector&lt;int&gt;</a> &gt;(<span class="stringliteral">&quot;int[]&quot;</span>, <span class="keyword">this</span>);
<a name="l00051"></a>00051   var_map_[<span class="stringliteral">&quot;double[]&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;vector&lt;double&gt;</a> &gt;(<span class="stringliteral">&quot;double[]&quot;</span>, <span class="keyword">this</span>);
<a name="l00052"></a>00052   var_map_[<span class="stringliteral">&quot;string[]&quot;</span>] = <span class="keyword">new</span> <a class="code" href="classreranker_1_1_var_map.html" title="A container to hold the mapping between named variables of a specific type and their values...">VarMap&lt;vector&lt;string&gt;</a> &gt;(<span class="stringliteral">&quot;string[]&quot;</span>, <span class="keyword">this</span>);
<a name="l00053"></a>00053 
<a name="l00054"></a>00054   <span class="comment">// Set up VarMap instances for each of the Factory-constructible types</span>
<a name="l00055"></a>00055   <span class="comment">// and their vectors.</span>
<a name="l00056"></a>00056   <span class="keywordflow">for</span> (<a class="code" href="classreranker_1_1_factory_container.html#a5bf60c03af9c6d6266a8065b9e45b1d1">FactoryContainer::iterator</a> factory_it = <a class="code" href="classreranker_1_1_factory_container.html#a8a206cc8e159df1be3c3b9ac3f87f8a3">FactoryContainer::begin</a>();
<a name="l00057"></a>00057        factory_it != <a class="code" href="classreranker_1_1_factory_container.html#a34ca18c43c96d8f15f943ad3c86fd2b3">FactoryContainer::end</a>(); ++factory_it) {
<a name="l00058"></a>00058     unordered_set&lt;string&gt; registered;
<a name="l00059"></a>00059     (*factory_it)-&gt;CollectRegistered(registered);
<a name="l00060"></a>00060     <span class="keywordtype">string</span> base_name = (*factory_it)-&gt;BaseName();
<a name="l00061"></a>00061 
<a name="l00062"></a>00062     <span class="comment">// Create type-specific VarMap from the Factory and add to var_map_.</span>
<a name="l00063"></a>00063     <a class="code" href="classreranker_1_1_var_map_base.html" title="A base class for a mapping from variables of a specific type to their values.">VarMapBase</a> *obj_var_map = (*factory_it)-&gt;CreateVarMap(<span class="keyword">this</span>);
<a name="l00064"></a>00064     var_map_[obj_var_map-&gt;<a class="code" href="classreranker_1_1_var_map_base.html#acf4c7614b477b3f986c0c1e7d9551ae0" title="Returns the type name of the variables of this instance.">Name</a>()] = obj_var_map;
<a name="l00065"></a>00065 
<a name="l00066"></a>00066     <span class="keywordflow">if</span> (debug_ &gt;= 2) {
<a name="l00067"></a>00067       cerr &lt;&lt; <span class="stringliteral">&quot;Environment: created VarMap for &quot;</span> &lt;&lt; obj_var_map-&gt;<a class="code" href="classreranker_1_1_var_map_base.html#acf4c7614b477b3f986c0c1e7d9551ae0" title="Returns the type name of the variables of this instance.">Name</a>()
<a name="l00068"></a>00068            &lt;&lt; endl;
<a name="l00069"></a>00069     }
<a name="l00070"></a>00070 
<a name="l00071"></a>00071     <span class="comment">// Create VarMap for vectors of shared_object of T and add to var_map_.</span>
<a name="l00072"></a>00072     <a class="code" href="classreranker_1_1_var_map_base.html" title="A base class for a mapping from variables of a specific type to their values.">VarMapBase</a> *obj_vector_var_map = (*factory_it)-&gt;CreateVectorVarMap(<span class="keyword">this</span>);
<a name="l00073"></a>00073     var_map_[obj_vector_var_map-&gt;<a class="code" href="classreranker_1_1_var_map_base.html#acf4c7614b477b3f986c0c1e7d9551ae0" title="Returns the type name of the variables of this instance.">Name</a>()] = obj_vector_var_map;
<a name="l00074"></a>00074 
<a name="l00075"></a>00075     <span class="keywordflow">if</span> (debug_ &gt;= 2) {
<a name="l00076"></a>00076       cerr &lt;&lt; <span class="stringliteral">&quot;Environment: created VarMap for &quot;</span> &lt;&lt; obj_vector_var_map-&gt;<a class="code" href="classreranker_1_1_var_map_base.html#acf4c7614b477b3f986c0c1e7d9551ae0" title="Returns the type name of the variables of this instance.">Name</a>()
<a name="l00077"></a>00077            &lt;&lt; endl;
<a name="l00078"></a>00078     }
<a name="l00079"></a>00079 
<a name="l00080"></a>00080     <span class="keywordflow">for</span> (unordered_set&lt;string&gt;::const_iterator it = registered.begin();
<a name="l00081"></a>00081          it != registered.end(); ++it) {
<a name="l00082"></a>00082       <span class="keyword">const</span> <span class="keywordtype">string</span> &amp;concrete_type_name = *it;
<a name="l00083"></a>00083 
<a name="l00084"></a>00084       unordered_map&lt;string, string&gt;::const_iterator concrete_to_factory_it =
<a name="l00085"></a>00085           concrete_to_factory_type_.find(concrete_type_name);
<a name="l00086"></a>00086       <span class="keywordflow">if</span> (concrete_to_factory_it != concrete_to_factory_type_.end()) {
<a name="l00087"></a>00087         <span class="comment">// Warn user that there are two entries for the same conrete type</span>
<a name="l00088"></a>00088         <span class="comment">// (presumably to different abstract factory types).</span>
<a name="l00089"></a>00089         cerr &lt;&lt; <span class="stringliteral">&quot;Environment: WARNING: trying to override existing &quot;</span>
<a name="l00090"></a>00090              &lt;&lt; <span class="stringliteral">&quot;concrete-to-factory type mapping [&quot;</span>
<a name="l00091"></a>00091              &lt;&lt; concrete_type_name &lt;&lt; <span class="stringliteral">&quot; --&gt; &quot;</span> &lt;&lt; concrete_to_factory_it-&gt;second
<a name="l00092"></a>00092              &lt;&lt; <span class="stringliteral">&quot;] with [&quot;</span> &lt;&lt; concrete_type_name &lt;&lt; <span class="stringliteral">&quot; --&gt; &quot;</span> &lt;&lt; base_name
<a name="l00093"></a>00093              &lt;&lt; endl;
<a name="l00094"></a>00094       }
<a name="l00095"></a>00095       concrete_to_factory_type_[concrete_type_name] = base_name;
<a name="l00096"></a>00096 
<a name="l00097"></a>00097       <span class="keywordflow">if</span> (debug_ &gt;= 2) {
<a name="l00098"></a>00098         cerr &lt;&lt; <span class="stringliteral">&quot;Environment: associating concrete typename &quot;</span>
<a name="l00099"></a>00099              &lt;&lt; concrete_type_name
<a name="l00100"></a>00100              &lt;&lt; <span class="stringliteral">&quot; with factory for &quot;</span> &lt;&lt; base_name &lt;&lt; endl;
<a name="l00101"></a>00101       }
<a name="l00102"></a>00102     }
<a name="l00103"></a>00103   }
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105 
<a name="l00106"></a>00106 <span class="keywordtype">void</span>
<a name="l00107"></a><a class="code" href="classreranker_1_1_environment_impl.html#ae8549b3ea2960701a99da3e6d4054c9e">00107</a> <a class="code" href="classreranker_1_1_environment_impl.html#ae8549b3ea2960701a99da3e6d4054c9e" title="Sets the specified variable to the value obtained from the following tokens available from the specif...">EnvironmentImpl::ReadAndSet</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;varname, <a class="code" href="classreranker_1_1_stream_tokenizer.html" title="A simple class for tokenizing a stream of tokens for the formally specified language used to construc...">StreamTokenizer</a> &amp;st) {
<a name="l00108"></a>00108   <span class="keywordtype">bool</span> is_vector =
<a name="l00109"></a>00109       st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a69295644dad07656c4790d6d5ed87557" title="Returns the type of the next token.">PeekTokenType</a>() == <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daaf92bc177d9920c389a149fa718c9ff3a">StreamTokenizer::RESERVED_CHAR</a> &amp;&amp;
<a name="l00110"></a>00110       st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a7f53bc3134419cb7b7f00bbd39430b42" title="Returns the next token that would be returned by the Next method.">Peek</a>() == <span class="stringliteral">&quot;{&quot;</span>;
<a name="l00111"></a>00111   <span class="keywordflow">if</span> (is_vector) {
<a name="l00112"></a>00112     <span class="comment">// Consume open brace.</span>
<a name="l00113"></a>00113     st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a8fad418b62ae370295fe324229e5d43e" title="Returns the next token in the token stream.">Next</a>();
<a name="l00114"></a>00114   } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a69295644dad07656c4790d6d5ed87557" title="Returns the type of the next token.">PeekTokenType</a>() == <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daaf92bc177d9920c389a149fa718c9ff3a">StreamTokenizer::RESERVED_CHAR</a> ||
<a name="l00115"></a>00115              (st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a69295644dad07656c4790d6d5ed87557" title="Returns the type of the next token.">PeekTokenType</a>() == <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daa900de35c73023cf15ec3954852da6809">StreamTokenizer::RESERVED_WORD</a> &amp;&amp;
<a name="l00116"></a>00116               st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a7f53bc3134419cb7b7f00bbd39430b42" title="Returns the next token that would be returned by the Next method.">Peek</a>() != <span class="stringliteral">&quot;true&quot;</span> &amp;&amp; st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a7f53bc3134419cb7b7f00bbd39430b42" title="Returns the next token that would be returned by the Next method.">Peek</a>() != <span class="stringliteral">&quot;false&quot;</span>)) {
<a name="l00117"></a>00117     ostringstream err_ss;
<a name="l00118"></a>00118     err_ss &lt;&lt; <span class="stringliteral">&quot;Environment: error: expected type but found token \&quot;&quot;</span>
<a name="l00119"></a>00119            &lt;&lt; st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a7f53bc3134419cb7b7f00bbd39430b42" title="Returns the next token that would be returned by the Next method.">Peek</a>() &lt;&lt; <span class="stringliteral">&quot;\&quot; of type &quot;</span>
<a name="l00120"></a>00120            &lt;&lt; <a class="code" href="classreranker_1_1_stream_tokenizer.html#ad9765fd0018581aa96914ac773cbe450" title="Returns a string type name for the specified TokenType constant.">StreamTokenizer::TypeName</a>(st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a69295644dad07656c4790d6d5ed87557" title="Returns the type of the next token.">PeekTokenType</a>());
<a name="l00121"></a>00121     <span class="keywordflow">throw</span> std::runtime_error(err_ss.str());
<a name="l00122"></a>00122   }
<a name="l00123"></a>00123 
<a name="l00124"></a>00124   <span class="keywordtype">string</span> next_tok = st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a7f53bc3134419cb7b7f00bbd39430b42" title="Returns the next token that would be returned by the Next method.">Peek</a>();
<a name="l00125"></a>00125   <span class="keywordtype">bool</span> is_object_type = <span class="keyword">false</span>;
<a name="l00126"></a>00126 
<a name="l00127"></a>00127   <span class="keywordtype">string</span> type = InferType(varname, st, is_vector, &amp;is_object_type);
<a name="l00128"></a>00128 
<a name="l00129"></a>00129   <span class="keywordflow">if</span> (debug_ &gt;= 1) {
<a name="l00130"></a>00130     cerr &lt;&lt; <span class="stringliteral">&quot;Environment::ReadAndSet: &quot;</span>
<a name="l00131"></a>00131          &lt;&lt; <span class="stringliteral">&quot;next_tok=&quot;</span> &lt;&lt; next_tok &lt;&lt; <span class="stringliteral">&quot;; type=&quot;</span> &lt;&lt; type &lt;&lt; endl;
<a name="l00132"></a>00132   }
<a name="l00133"></a>00133 
<a name="l00134"></a>00134   <span class="keywordflow">if</span> (type == <span class="stringliteral">&quot;&quot;</span>) {
<a name="l00135"></a>00135     ostringstream err_ss;
<a name="l00136"></a>00136     err_ss &lt;&lt; <span class="stringliteral">&quot;Environment: error: could not infer type for variable &quot;</span>
<a name="l00137"></a>00137            &lt;&lt; varname;
<a name="l00138"></a>00138     <span class="keywordflow">throw</span> std::runtime_error(err_ss.str());
<a name="l00139"></a>00139   }
<a name="l00140"></a>00140 
<a name="l00141"></a>00141   <span class="comment">// Check that type is a key in var_map_.</span>
<a name="l00142"></a>00142 
<a name="l00143"></a>00143   var_map_[type]-&gt;ReadAndSet(varname, st);
<a name="l00144"></a>00144   types_[varname] = type;
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146 
<a name="l00147"></a>00147 <span class="keywordtype">string</span>
<a name="l00148"></a>00148 EnvironmentImpl::InferType(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;varname,
<a name="l00149"></a>00149                            <span class="keyword">const</span> <a class="code" href="classreranker_1_1_stream_tokenizer.html" title="A simple class for tokenizing a stream of tokens for the formally specified language used to construc...">StreamTokenizer</a> &amp;st, <span class="keywordtype">bool</span> is_vector,
<a name="l00150"></a>00150                            <span class="keywordtype">bool</span> *is_object_type) {
<a name="l00151"></a>00151   *is_object_type = <span class="keyword">false</span>;
<a name="l00152"></a>00152   <span class="keywordtype">string</span> next_tok = st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a7f53bc3134419cb7b7f00bbd39430b42" title="Returns the next token that would be returned by the Next method.">Peek</a>();
<a name="l00153"></a>00153   <span class="keywordflow">switch</span> (st.<a class="code" href="classreranker_1_1_stream_tokenizer.html#a69295644dad07656c4790d6d5ed87557" title="Returns the type of the next token.">PeekTokenType</a>()) {
<a name="l00154"></a>00154     <span class="keywordflow">case</span> <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daa900de35c73023cf15ec3954852da6809">StreamTokenizer::RESERVED_WORD</a>:
<a name="l00155"></a>00155       <span class="keywordflow">if</span> (next_tok == <span class="stringliteral">&quot;true&quot;</span> || next_tok == <span class="stringliteral">&quot;false&quot;</span>) {
<a name="l00156"></a>00156         <span class="keywordflow">return</span> is_vector ? <span class="stringliteral">&quot;bool[]&quot;</span> : <span class="stringliteral">&quot;bool&quot;</span>;
<a name="l00157"></a>00157       } <span class="keywordflow">else</span> {
<a name="l00158"></a>00158         <span class="keywordflow">return</span> <span class="stringliteral">&quot;&quot;</span>;
<a name="l00159"></a>00159       }
<a name="l00160"></a>00160       <span class="keywordflow">break</span>;
<a name="l00161"></a>00161     <span class="keywordflow">case</span> <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daa6719f11fc4a17c542500088211a08df3">StreamTokenizer::STRING</a>:
<a name="l00162"></a>00162       <span class="keywordflow">return</span> is_vector ? <span class="stringliteral">&quot;string[]&quot;</span> : <span class="stringliteral">&quot;string&quot;</span>;
<a name="l00163"></a>00163       <span class="keywordflow">break</span>;
<a name="l00164"></a>00164     <span class="keywordflow">case</span> <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daa033acb728cba240ddf92404a8e709b79">StreamTokenizer::NUMBER</a>:
<a name="l00165"></a>00165       {
<a name="l00166"></a>00166         <span class="comment">// If a token is a NUMBER, it is a double iff it contains a</span>
<a name="l00167"></a>00167         <span class="comment">// decimal point.</span>
<a name="l00168"></a>00168         <span class="keywordtype">size_t</span> dot_pos = next_tok.find(<span class="charliteral">&#39;.&#39;</span>);
<a name="l00169"></a>00169         <span class="keywordflow">if</span> (dot_pos != string::npos) {
<a name="l00170"></a>00170           <span class="keywordflow">return</span> is_vector ? <span class="stringliteral">&quot;double[]&quot;</span> : <span class="stringliteral">&quot;double&quot;</span>;
<a name="l00171"></a>00171         } <span class="keywordflow">else</span> {
<a name="l00172"></a>00172           <span class="keywordflow">return</span> is_vector ? <span class="stringliteral">&quot;int[]&quot;</span> : <span class="stringliteral">&quot;int&quot;</span>;
<a name="l00173"></a>00173         }
<a name="l00174"></a>00174       }
<a name="l00175"></a>00175       <span class="keywordflow">break</span>;
<a name="l00176"></a>00176     <span class="keywordflow">case</span> <a class="code" href="classreranker_1_1_stream_tokenizer.html#a43c556f438853bde82330f852de412daa6f3f909fb7f4fdc76c355f131a0cd392">StreamTokenizer::IDENTIFIER</a>:
<a name="l00177"></a>00177       {
<a name="l00178"></a>00178         <span class="keywordtype">string</span> type = <span class="stringliteral">&quot;&quot;</span>;
<a name="l00179"></a>00179 
<a name="l00180"></a>00180         <span class="comment">// Find out if next_tok is a concrete typename or a variable.</span>
<a name="l00181"></a>00181         unordered_map&lt;string, string&gt;::const_iterator factory_type_it =
<a name="l00182"></a>00182             concrete_to_factory_type_.find(next_tok);
<a name="l00183"></a>00183         unordered_map&lt;string, string&gt;::const_iterator var_type_it =
<a name="l00184"></a>00184             types_.find(next_tok);
<a name="l00185"></a>00185         <span class="keywordflow">if</span> (factory_type_it != concrete_to_factory_type_.end()) {
<a name="l00186"></a>00186           <span class="comment">// Set type to be abstract factory type.</span>
<a name="l00187"></a>00187           <span class="keywordflow">if</span> (debug_ &gt;= 1) {
<a name="l00188"></a>00188             cerr &lt;&lt; <span class="stringliteral">&quot;Environment::InferType: concrete type is &quot;</span> &lt;&lt; next_tok
<a name="l00189"></a>00189                  &lt;&lt; <span class="stringliteral">&quot;; mapping to abstract Factory type &quot;</span>
<a name="l00190"></a>00190                  &lt;&lt; factory_type_it-&gt;second &lt;&lt; endl;
<a name="l00191"></a>00191           }
<a name="l00192"></a>00192           type = factory_type_it-&gt;second;
<a name="l00193"></a>00193           *is_object_type = <span class="keyword">true</span>;
<a name="l00194"></a>00194           <span class="keywordtype">string</span> type = is_vector ? next_tok + <span class="stringliteral">&quot;[]&quot;</span> : next_tok;
<a name="l00195"></a>00195         } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (var_type_it != types_.end()) {
<a name="l00196"></a>00196           <span class="comment">// Could be a variable, in which case we need not only to return</span>
<a name="l00197"></a>00197           <span class="comment">// the variable&#39;s type, but also set is_object_type and is_vector</span>
<a name="l00198"></a>00198           <span class="comment">// based on the variable&#39;s type string.</span>
<a name="l00199"></a>00199           <span class="keywordtype">string</span> append = is_vector ? <span class="stringliteral">&quot;[]&quot;</span> : <span class="stringliteral">&quot;&quot;</span>;
<a name="l00200"></a>00200           type = var_type_it-&gt;second + append;
<a name="l00201"></a>00201           <span class="keywordflow">if</span> (debug_ &gt;= 1) {
<a name="l00202"></a>00202             cerr &lt;&lt; <span class="stringliteral">&quot;Environment::InferType: found variable &quot;</span>
<a name="l00203"></a>00203                  &lt;&lt; var_type_it-&gt;first &lt;&lt; <span class="stringliteral">&quot; of type &quot;</span> &lt;&lt; var_type_it-&gt;second
<a name="l00204"></a>00204                  &lt;&lt; <span class="stringliteral">&quot;; type is &quot;</span> &lt;&lt; type &lt;&lt; endl;
<a name="l00205"></a>00205           }
<a name="l00206"></a>00206         } <span class="keywordflow">else</span> {
<a name="l00207"></a>00207           ostringstream err_ss;
<a name="l00208"></a>00208           err_ss &lt;&lt; <span class="stringliteral">&quot;Environment: error: token &quot;</span> &lt;&lt; next_tok
<a name="l00209"></a>00209                  &lt;&lt; <span class="stringliteral">&quot; is neither a variable nor a concrete object typename&quot;</span>;
<a name="l00210"></a>00210           <span class="keywordflow">throw</span> std::runtime_error(err_ss.str());
<a name="l00211"></a>00211         }
<a name="l00212"></a>00212         <span class="keywordflow">return</span> type;
<a name="l00213"></a>00213       }
<a name="l00214"></a>00214       <span class="keywordflow">break</span>;
<a name="l00215"></a>00215     <span class="keywordflow">default</span>:
<a name="l00216"></a>00216       <span class="keywordflow">return</span> <span class="stringliteral">&quot;&quot;</span>;
<a name="l00217"></a>00217   }
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 
<a name="l00220"></a>00220 }  <span class="comment">// namespace reranker</span>
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